<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>size 属性</title>
</head>
<body>

<form action="">
  First name:<br>
  <input type="text" name="firstname" value ="Bill" size="40">
  <br>
  Last name:<br>
  <input type="text" name="lastname">
</form>


</body>
</html>